Gear drive is one of the parts and parcels of a mechanical power transmission system that transmits power and motion by successive engagement and disengagement of teeth driver and driven gear. so here this article gives the difference between straight bevel gear and spiral bevel gear to better understand this topic.
Difference between straight bevel gear and spiral bevel gear:
- A straight bevel gear is a teeth of this type of gear are straight and are cut along the axis on a cone, while the spiral bevel gear is the teeth are spiral and are cut in the form of the spiral curve on the pitch cone.
- Straight bevel gear sudden contact also causes noise, while the spiral bevel gear operation is quiet.
- The straight bevel gear has two teeth of the mating gears come in sudden contact. The contact is always a line of length equal to the face width of teeth, while the spiral bevel gear has teeth of two mating gears gradually come in contact. Engagement starts with a point and gradually becomes a line.
- In straight bevel gear, shock loading induces a vibration and thus its operation is not smooth, but the spiral bevel gear gradually building up of load, It produces fewer vibrations and thus the operation is smooth.
- In the straight bevel gear, due to sudden contact, teeth are also subjected to impact or shock loading, while in the spiral bevel gear the teeth are subjected to gradual loading.
- A straight bevel gear is exerted less thrust force on the bearing that holds the shafts, while the spiral bevel gear is exerted more thrust force on bearings.
- A straight bevel gear is designing and manufacturing of straight teeth bevel gear easier and thus these are cheaper, while the spiral bevel gear, are complicated design and manufacturing leads to higher cost for this type of gear.
- The life of the straight bevel gear is shorter as it subjected to impact loading and vibrations, while the spiral bevel gear has a longer life.
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